import java.io.*;
import java.util.*;

public class _test {
    static StreamTokenizer in = new StreamTokenizer(new BufferedReader(new InputStreamReader(System.in)));
    static PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
    static BufferedReader bin = new BufferedReader(new InputStreamReader(System.in));

    static int cin() throws IOException {
        in.nextToken();
        return (int) in.nval;
    }
    
    class test {
        
    }
    static class t2 {
        
    }

    public static void main(String[] args) throws IOException {
        Set<Integer> set = new HashSet<>();
        set.add(1);
        set.add(3);
        set.add(2);
        set.add(5);
        set.add(4);
        set.forEach(o -> System.out.println(o));
        test test = new _test().new test();
        t2 t = new t2();
        
    }
}